Accession Number : AD0755795

Title :   Intercepting an Accelerating Target Using Quasi-Optimal Control,

Corporate Author : CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Eide,Henry Flader

Report Date : SEP 1972

Pagination or Media Count : 49

Abstract : The technique of quasi-optimum control, developed by B. Friedland is applied to the problem of intercepting an accelerating target with an air-launched missile. The problem is first stated as an optimal control problem with nonlinear system equations and a quadratic cost functional. Several techniques of finding feedback type optimal controls which have been developed by solving various approximations to the original problem are then described. None of these techniques makes explicit use of a measurement of lateral target acceleration. Three control techniques are then developed which use measurements of target acceleration to develop closed form controls. The first control is found by solving a linearized version of the original problem. The other two controls are quasi-optimum controls which use the solution of the linearized problem to obtain a new feedback type solution that is more nearly optimal for the original problem. Based on performance in simulations of typical attack geometries and target maneuvers, these three control techniques are found to be superior to previous techniques. (Author)

Descriptors :   (*GUIDED MISSILE TRAJECTORIES, PROPORTIONAL NAVIGATION), (*INTERCEPT TRAJECTORIES, GUIDED MISSILES), (*ADAPTIVE CONTROL SYSTEMS, MATHEMATICAL MODELS), PARTIAL DIFFERENTIAL EQUATIONS, MATRICES(MATHEMATICS), MANEUVERABILITY, OPTIMIZATION

Subject Categories : Theoretical Mathematics
      Military Operations, Strategy and Tactics
      Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE